M Madhu π Tutor II β 12.07K Points Q. The factorisation of ab – a – b + 1 is (A) (a – 1)(b – 1) (B) (a + 1)(b + 1) (C) (a – 1)(b + 1) (D) (a + 1)(b – 1) ποΈ Show Answer π¬ Discuss π Share β Correct Answer: (A) (a – 1)(b – 1)